<template>
  <el-container class="home-container">
    <!--头部区域-->
    <el-header>
      <div>
        <img src="../assets/heima.png"/>
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区域-->
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class='toggle-button' @click='toggleCollapse'>|||</div>
      <!--侧边栏菜单区域-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened :collapse='isCollapse' :collapse-transition='false' router :default-active='activePath'>
          <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for='item in menuList' :key='item.id'>
            <!--一级菜单的模板区域-->
            <template slot="title">
              <!--图标-->
              <i :class="iconsObj[item.id]+''"></i>
              <!--文本-->
              <span>{{item.authName}}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for='subItem in item.children' :key='subItem.id' @click="saveNavStatus('/'+subItem.path)">
              <!--图标-->
              <i class="el-icon-menu"></i>
              <!--文本-->
              <span>{{subItem.authName}}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右侧内容主体-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  name: 'Home',
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击按钮,切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavStatus (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less">
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
